Just a sudden, random idea. To produce a nice, arty, sound-visualisation effect how about cutting the cup shorter, pouring in a thin layer of water, then using mirrors to reflect a projector beam off the surface before focusing the dancing image onto a screen? Promoting public engagement with science through a contagious delight in phenomena * <mailto:ian%40interactives.co.uk> [log in to unmask] * <http://www.interactives.co.uk> http://www.interactives.co.uk * Give people facts and you feed their minds for an hour. Awaken curiosity and they feed their own minds for a lifetime. * Ian Russell (Twitter: ianrusselluk) ********************************************************************** 1. To suspend yourself from the list, whilst on leave, for example, send an email to mailto:[log in to unmask] with the following message: set psci-com nomail -- [include hyphens] 2. To resume email from the list, send an email to [log in to unmask] with the message: set psci-com mail -- [include hyphens] 3. To leave psci-com, send an email to [log in to unmask] with the message: leave psci-com -- [include hyphens] 4. Further information about the psci-com discussion list, including list archive, can be found at the list web site: http://www.jiscmail.ac.uk/lists/psci-com.html 5. The psci-com gateway to internet resources on science communication and science and society can be found at http://psci-com.ac.uk 6. To contact the Psci-com list owner, please send an email to mailto:[log in to unmask] **********************************************************************